The sweet spot for cognitive function appeared to be between 20-24°C (68-75°F). When temperatures deviated from this range by just 4°C (7°F) in either direction

The sweet spot for cognitive function appeared to be between 20-24°C (68-75°F). When temperatures deviated from this range by just 4°C (7°F) in either direction, participants were twice as likely to report difficulty maintaining attention on tasks.